Bi-directional with Buffer Digital I/O Board for ISA

This product is PC/AT which imitates the mode 0 of i8255 and performs bidirectional TTL level digital input and output, and an interface board for the compatible machines. This board can be used being able to mount in the expansion slot or I/O expansion unit of the main part of a personal computer, and can be outputted and inputted 48 points by this one sheet.

	A high-speed response is possible at non-isolating TTL level input and output.
	A total of six groups and digital input and output of 48 points are possible, using eight points as one group.
	The input-and-output direction is set up by software.
	Four input signals are interrupted and use is possible as an input.